Initial condition files are provided for fully coupled BCN and offline
ICN cases for 1850 and 2000 at finite volume grids: 1deg (0.9x1.25), 2deg (1.9x2.5), and T31 resolutions.
We also have interpolated initial conditions for BCN for 1850 and 2000 for two finite volume
grids: 10x15, 4x5 and two HOMME grids (ne30np4 and ne120np4). There's also an
initial condition file for ICN with the prognostic crop model for 2000 at 2deg
resolution, and one with CLMSP for 2000 at 2deg resolution. We also have initial
conditions for offline CNDV for 1850.
The 1850 initial condition files are in 'reasonable' equilibrium. The 2000 initial condition files represent
the model state for the year 2000, and have been taken from transient simulations.
Therefore, by design the year 2000 initial condition files do not represent an
equilibrium state. Note also that spinning the 2000 initial conditions out to
equilibrium will not reflect the best estimate of the real carbon/nitrogen state
for the year 2000.

Users can generate initial condition files at different resolutions by
using the CLM tool interpinic to interpolate from one of the
provided resolutions to the resolution of interest. Interpolated initial condition
files may no longer be in 'reasonable' equilibrium.

Aerosol deposition is a required field to CLM4 sent from the
atmosphere model. Simulations without aerosol deposition will exhibit unreasonably
high snow albedos. The model sends aerosol deposition from the atmospheric model (either
CAM or DATM). When running with prescribed aerosol the atmosphere
model will interpolate the aerosols from 2-degree resolution to the resolution the
atmosphere model is running at.